JPS54106057A - Blooming method for steel ingot - Google Patents
Blooming method for steel ingotInfo
- Publication number
- JPS54106057A JPS54106057A JP1369378A JP1369378A JPS54106057A JP S54106057 A JPS54106057 A JP S54106057A JP 1369378 A JP1369378 A JP 1369378A JP 1369378 A JP1369378 A JP 1369378A JP S54106057 A JPS54106057 A JP S54106057A
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- steel ingot
- blooming
- latter half
- pass schedule
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title abstract 6
- 239000010959 steel Substances 0.000 title abstract 6
- 238000005096 rolling process Methods 0.000 abstract 7
- 238000002791 soaking Methods 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 238000001816 cooling Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 238000005204 segregation Methods 0.000 abstract 1
- 239000007921 spray Substances 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/02—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
- B21B1/026—Rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0233—Spray nozzles, Nozzle headers; Spray systems
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
PURPOSE:To improve the yield of the blooming, by water cooling the top and bottom portions of the steel ingot after taking away from the soaking pit, so as to give a specified temperature dfference between the surface and interior, and further, by performing the rolling on the bottom at a limited draft percentage under a strong rolling load in the latter half of the rolling pass schedule. CONSTITUTION:The steel ingot 1 taken away from the soaking pit 3 is placed on the carrying table 5 of the blooming mill 4; and then, the top portion T and the bottom portion B of the steel ingot 1 are water cooled by the ring type sprays 61 and 62 so as to make 150 deg.C or more lower the surface temperature of the steel ingot than the internal temperature. After that, in the case of the blooming, the rolling is carried out under a strong rolling reduction taking the ratio of draft percentages between the bottom rolling and the top rolling as above two, at the latter half of the pass schedule. Hereby, the molten steel at the axial center portion relatively satisfactorily stretches being spread as far as the end portions, so that the folding defect and the segregation at the top and bottom portins are extremely reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1369378A JPS54106057A (en) | 1978-02-08 | 1978-02-08 | Blooming method for steel ingot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1369378A JPS54106057A (en) | 1978-02-08 | 1978-02-08 | Blooming method for steel ingot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54106057A true JPS54106057A (en) | 1979-08-20 |
Family
ID=11840261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1369378A Pending JPS54106057A (en) | 1978-02-08 | 1978-02-08 | Blooming method for steel ingot |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54106057A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5024900A (en) * | 1973-07-09 | 1975-03-17 |
-
1978
- 1978-02-08 JP JP1369378A patent/JPS54106057A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5024900A (en) * | 1973-07-09 | 1975-03-17 |
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